Mercurial Hosting > luan
view src/luan/modules/parsers/Xml.java @ 1471:f5b8c7e1ac82
xml
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 14 Apr 2020 20:20:45 -0600 |
parents | 35f3bfd4f51d |
children | 2e8a5df45d56 |
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package luan.modules.parsers; import java.util.Collections; import java.util.Map; import java.util.LinkedHashMap; import java.util.List; import java.util.ArrayList; import goodjava.parser.ParseException; import goodjava.xml.XmlElement; import goodjava.xml.XmlParser; import luan.Luan; import luan.LuanTable; import luan.LuanException; public final class Xml { public static String toString(LuanTable tbl) throws LuanException { XmlElement[] elements = elements(tbl); if( elements.length != 1 ) throw new LuanException("XML must have 1 root element"); return elements[0].toString(); } private static final Integer ONE = Integer.valueOf(1); private static final Integer TWO = Integer.valueOf(2); private static final String LIST = "$list"; private static XmlElement[] elements(LuanTable tbl) throws LuanException { List<XmlElement> list = new ArrayList<XmlElement>(); for( Map.Entry entry : tbl.iterable() ) { Object key = entry.getKey(); if( key.equals(ONE) ) continue; if( !(key instanceof String) ) throw new LuanException("XML key must be string"); String name = (String)key; Object value = entry.getValue(); if( value instanceof String ) { list.add( element(name,value) ); } else { LuanTable t = (LuanTable)value; LuanTable tList = (LuanTable)t.get(LIST); if( tList == null ) { list.add( element(name,t) ); } else { for( Object obj : tList.asList() ) { list.add( element(name,obj) ); } } } } return list.toArray(new XmlElement[0]); } private static XmlElement element(String name,Object obj) throws LuanException { if( obj instanceof String ) { return new XmlElement( name, Collections.emptyMap(), (String)obj ); } LuanTable t = (LuanTable)obj; Map<String,String> attributes = attributes(t); String s = (String)t.get(TWO); if( s != null ) { return new XmlElement(name,attributes,s); } else { XmlElement[] elements = elements(t); if( elements.length==0 ) { return new XmlElement(name,attributes); } else { return new XmlElement(name,attributes,elements); } } } private static Map<String,String> attributes(LuanTable tbl) throws LuanException { Object obj = tbl.get(ONE); if( obj==null ) return Collections.emptyMap(); LuanTable t = (LuanTable)obj; Map<String,String> map = new LinkedHashMap<String,String>(); for( Map.Entry entry : t.iterable() ) { String name =(String)entry.getKey(); String value =(String)entry.getValue(); map.put(name,value); } return map; } public static LuanTable parse(Luan luan,String s) throws ParseException, LuanException { XmlElement element = XmlParser.parse(s); LuanTable tbl = new LuanTable(luan); addElements(tbl,new XmlElement[]{element}); return tbl; } private static LuanTable addElements(LuanTable tbl,XmlElement[] elements) throws LuanException { for( XmlElement element : elements ) { LuanTable t = new LuanTable(tbl.luan()); if( !element.attributes.isEmpty() ) { LuanTable attrs = new LuanTable(tbl.luan()); for( Map.Entry<String,String> entry : element.attributes.entrySet() ) { attrs.put(entry.getKey(),entry.getValue()); } t.put( 1, attrs ); } Object value = t; if( element.content == null ) { // nothing } else if( element.content instanceof String ) { if( t.isEmpty() ) { value = element.content; } else { t.put( 2, element.content ); } } else { XmlElement[] els = (XmlElement[])element.content; addElements(t,els); } Object old = tbl.get(element.name); if( old==null ) { tbl.put(element.name,value); } else { LuanTable list = null; if( old instanceof LuanTable ) list = (LuanTable)((LuanTable)old).get(LIST); if( list==null ) { list = new LuanTable(tbl.luan()); list.rawAdd(old); LuanTable wrap = new LuanTable(tbl.luan()); wrap.put(LIST,list); tbl.put(element.name,wrap); } list.rawAdd(value); } } return tbl; } }